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-- !!! RW files
module Main(main) where
import System.IO
import System.Directory ( removeFile, doesFileExist )
import Control.Monad
main = do
f <- doesFileExist "readwrite001.inout"
when f (removeFile "readwrite001.inout")
hdl <- openFile "readwrite001.inout" ReadWriteMode
hSetBuffering hdl LineBuffering
hPutStr hdl "as"
hSeek hdl AbsoluteSeek 0
ch <- hGetChar hdl
print ch
hPutStr hdl "ase"
hSeek hdl AbsoluteSeek 0
putChar '\n'
ls <- hGetContents hdl
putStrLn ls
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